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  2. Zimmermann telegram - Wikipedia

    en.wikipedia.org/wiki/Zimmermann_Telegram

    The Zimmermann telegram (or Zimmermann note or Zimmermann cable) was a secret diplomatic communication issued from the German Foreign Office on January 17, 1917, that proposed a military contract between the German Empire and Mexico if the United States entered World War I against Germany.

  3. World War I cryptography - Wikipedia

    en.wikipedia.org/wiki/World_War_I_cryptography

    The decoding by British Naval intelligence of the Zimmermann telegram helped bring the United States into the war. Trench codes were used by field armies of most of the combatants (Americans, British, French, German) in World War I. [1] The most commonly used codes were simple substitution ciphers. More important messages generally used ...

  4. Room 40 - Wikipedia

    en.wikipedia.org/wiki/Room_40

    Zimmermann telegram as decoded by Room 40 All British ships were under instructions to use radio as sparingly as possible and to use the lowest practical transmission power. Room 40 had benefited greatly from the free chatter between German ships, which gave them many routine messages to compare and analyse, and from the German habit of ...

  5. February 1917 - Wikipedia

    en.wikipedia.org/wiki/February_1917

    Zimmermann Telegram – British intelligence officer William Reginald Hall, chief of Room 40 for the Admiralty, shared a decoded German telegram with Edward Bell, secretary of the United States Embassy in the United Kingdom, that revealed a military alliance proposal between Mexico and Germany, including support to conquer the states of Texas ...

  6. Heinrich von Eckardt - Wikipedia

    en.wikipedia.org/wiki/Heinrich_von_Eckardt

    However, the telegram was intercepted by the British on its way from Bernstorff to Eckardt and was decoded by Room 40. In the telegram, Zimmermann instructed Eckardt to approach President Venustiano Carranza with a proposition in two parts: firstly, to form an alliance with Germany, and secondly, should Germany drop its neutrality against the ...

  7. United States involvement in the Mexican Revolution - Wikipedia

    en.wikipedia.org/wiki/United_States_involvement...

    Germany sent a telegram in code outlining a plan to aid Mexico in such a conflict and Mexico's reward would be to regain land lost to the U.S. in the Mexican American War (1846–48). The Zimmermann Telegram was intercepted and decoded by the British and given to Wilson, who then made public. Carranza, whose faction had benefited from U.S ...

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Reginald Hall - Wikipedia

    en.wikipedia.org/wiki/Reginald_Hall

    Admiral Sir William Reginald Hall KCMG CB (28 June 1870 – 22 October 1943), known as Blinker Hall, was the British Director of Naval Intelligence (DNI) from 1914 to 1919. . Together with Sir Alfred Ewing he was responsible for the establishment of the Royal Navy's codebreaking operation, Room 40, which decoded the Zimmermann telegram, a major factor in the entry of the United States into ...